Buck Converter Load Transient Analysis
Thought for 8 mins 6 sec
Load-Transient Result
Measured metrics
Interpretation
Settling-time definition used
I ran the transient with the load stepping from 100 mA to 400 mA at 3.000 ms, and measured the response around the load-step event, not startup.
commentFileId-418bc5aaad272bfc602212575dad5bfc32ba904859d57e8b7e1e5f60edd23729
Table
| Metric | Value |
|---|---|
| Step time | 3.000 ms |
| Pre-step Vout | 3.177687 V |
| Final settled Vout | 3.177761 V |
| Pre-step I_L2 | 100.12 mA |
| Final settled I_L2 | 397.06 mA |
| Output undershoot | 9.383 mV |
| Output overshoot | 9.250 mV |
| Settling time | 0 µs for ±1% band |
Table
| Item | Result |
|---|---|
| Minimum Vout after step | 3.168305 V at 3.001617 ms |
| Peak Vout during recovery | 3.187011 V at 3.043363 ms |
| Undershoot vs pre-step Vout | 0.295% |
| Overshoot vs final Vout | 0.291% |
I used a band of ±1% around the final settled Vout:
- Final settled Vout = 3.177761 V
- Settling band = 3.145983 V to 3.209539 V
The waveform never left that band, so the measured settling time is effectively 0 µs for that criterion.
Important note
This result is based on the available averaged behavioral model of the regulator, so it is good for control-envelope/load-step response but does not include switching ripple.
If you want, I can next give you:
- a tighter settling-time measurement such as ±0.5%, ±0.25%, or ±5 mV, or
- a more detailed follow-up analysis of the transient waveform.
Use tighter settling band
Check exact inductor ref
Review converter robustness
